An 87-year-old woman was found bludgeoned to death in her Bronx home after her emotionally disturbed grandson’s 90-minute standoff with cops ended Thursday morning, police sources said.

Eric Perez’s meltdown began at 7:20 a.m., when witnesses said he walked naked onto to the second-floor balcony of the Hollywood Avenue home in Throggs Neck, and began ranting about the apocalypse, and raining debris on responding police.

“He was saying something about an epiphany and an apocalypse,” said neighbor Joanne Santos. “He was just tossing whatever he could get his hands on.”

As police dodged the hail, which included a chair and a small table, Perez, 48, ducked back into the house and locked himself inside a bedroom.

Cops in SWAT gear convinced him to open the door after about 90 minutes, but were greeted by the grim discovery of Alice Durso’s body, on the floor with blunt trauma to the head, authorities said.
Even after emerging, the portly hell-raiser wouldn’t go quietly, and had to be tased before he was cuffed and led out of the house in just his plaid boxers, sources said.

“You could hear him screaming ‘a—–e’ at the cops,” Santos said.

Object found at the scene.

He was taken to Jacobi Hospital for a psychiatric evaluation.

The medical examiner is working to officially determine how Durso died.

The man’s mother, stepfather, and a home health aide were also brought to Jacobi for minor injuries suffered in the chaos.

Outside the home, neighbors mourned the Alzheimer’s-afflicted Durso.

“Oh my God, that poor lady,” said Santos. “She was sick, her husband disappeared some years back and now this.”

Durso’s husband, Vincent, mysteriously vanished after dropping off his wife’s aide at the home, the Post reported in May 2010.

Alice Durso’s death was the second grisly incident to ring in 2015 in The Bronx.

Just before 3 a.m., a man was shot dead at the St. Mary’s Park housing development in Melrose in what cops said was the first homicide of the new year.

Herb Huntley, 26, was found in the lobby of the Westchester Avenue building with multiple gunshot wounds to the head and torso, police said.